Improvement in couplings for pipe and oil-well tubing



D. JONES.

Couplings for Pipes and Uil-Well Tubing.

N0 142,792i Pzi'centedSeptemberi6,1873l STATES PATENT OFFICE' DANIELl JONES, OF4 BOSTON, MASSACHUSETTS, ASSIGNOR OF ONE HALF HIS RIGHT TO NATIONAL TUBE WORKS COMPANY, OF SAME PLACE.

, '.'lmPnovEMi-:NT 1N couPLlNes FoR PIPE AND o|LwELL TUBING.

v Specification forming part of Letters Patent No. 142,792, dated September 16, 1873; application filed June 19,1371.

To all whoml it may concern y Be it known that I, DANIEL JONES, of Boston, in the county of Suffolk and State of Mas sachusetts, have invented a. new and useful Coupling for Iipes und Oil-Well Tubing; and I do hereby declu-rethe following to be a full and correct description ofthe saine, reference being had to the accompanying drnwin g, which is n longitudinal section of n piece of tubing with my improved coupling applied.

I have found, in the use of great lengths of tubing made by coupling pipes together, ,as in the tubing ofoil-we11s,that there is a great tendency of the tube to break off et the end of the coupling, the line ot' fracture coinciding almost invariably with the last thread of the screwvcut upon the tubing. This isn serious inconvenience as well as a great expense.

To remedy it I have essnyed with success the use of it coupling in which there is, at

euch end,n smooth portion, which I call the sleeve, projecting beyond the female screw cut upon the interior of the coupling, which receives the threaded portion of the tube.l

This is clearly. illustrted in the drawing, i'n

which A marks the coupling; B, the sleeve or smooth portion of the coupling, and C 'the tube, the threaded end of which is received by the 'female screw of the coupling A. The

sleeve B projects, as shown, beyond the` threaded portion of the tube C, and tits snugly upon the tube, stiiening and strengthening the joint, and preventing its liability'to be' broken by the oscillation ot' the tube.

Having thus fully .described my invention,

what I claim, and desire to secure by Letters Patent, is

The combination, with the tubing of oil- Wells, of the coupling A, having the sleeve B,

all constructed and united in 'the manner and i for the purpose specitied. e

The above specificntion'of my seid inveuy 

